Do you think any of the principles should be eliminated? Can you think of any principles which need to be added? If so, why?

The U.S. Supreme Court has ruled that there are four guiding principles that should be used when determining whether a juror has been properly excused for cause in capital cases. What are those four principles? Do you think any of the principles should be eliminated? Can you think of any principles which need to be added? If so, why?